Knife Bolt for Challenge 370 E/G & 420, National & early Seybold paper cutters. (Equivalent to the original Challenge "1/2 x 1" V-Thread knife bolt, part number S-645, with the equivalent washer, originally part number S-353.)
| Length (below washer): | 1-3/32" |
| Thread: | 1/2"-12 |
The washer is captive, it spins in place but it will not fall off.
